Peeping out II

A unit square and a rectangle touching three square sides and passing through the midpoint of the upper side. What is the minimal blue area?

Scroll down for a solution to this problem.


The minimal blue area is 1/2.

Solution by Natalie Guo.

Note that Peeping out shows that the minimum is actually reached.


Please find here the video solution: Video: Peeping out II.

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